# TextProBar.py
import time

scale = 50
print('执行开始'.center(scale // 2, '-'))
start = time.perf_counter()
for i in range(scale + 1):
    a = '*' * i
    b = '.' * (scale - i)
    c = (i / scale) * 100
    dur = time.perf_counter() - start
    print('\r{:^3.0f}%[{}->{}]{:.2f}s'.format(c, a, b, dur), end='')
    time.sleep(0.1)
print('\n' + '执行结束'.center(scale // 2, '-'))
